University of Illinois Extension

Large Trees

ASH

Selection Info Some Common Diseases Some Common Insects and Insect-related

Tolerates wide range of growing conditions, green - white & blue species, 50+ feet tall.

Verticillium wilt
Canker
Leaf spots including:

Anthracnose
Ash ring spot

Root rot
Wood rot
Collar rot

Ash boder
Aphids
Flower Gall of Ash (male trees only)
Plant Bug
Cotton Maple Scale
Emerald Ash Borer

BUCKEYE AND HORSECHESTNUT

Selection Info Some Common Diseases Some Common Insects and Insect-related

"Haystack trees" - Branches low to ground, moist well-drained soils.
"Nut is toxic," 40 to 100 feet tall.

Leaf Blotch
Scorch
Canker
Wood rot

Leaf Miner

DOUGLAS FIR

Selection Info Some Common Diseases Some Common Insects and Insect-related

Well-drained, moist, rich, acidic soils, sun, high humidity. 40 to 200 feet tall (not true fir)
Blue foliage.

Needle cast
Needle Blight
Wood rot
Tip Blight
Canker
Root rot

Woolly Aphid (Alternate host not required)

HACKBERRY

Selection Info Some Common Diseases Some Common Insects and Insect-related

Good street tree - tolerates wide range of growing conditions. Growth & leaves size, shape, appearance similar to American elm. 40 to 60 feet tall.

Witches Broom
Root rot
Wood rot
Island Chlorosis
Canker

Mites
Cottony Mapple Scale
Leaf Galls

HONEYLOCUST & KENTUCKY COFFEE TREE

Selection Info Some Common Diseases Some Common Insects and Insect-related

Get thornless/ podless honeylocust, sunburst has yellowish new growth, tolerates wide range of growing conditions, except prolong wet soils, 30 to 100 feet tall.
Coffee tree has pods, larger leaves & bigger tree than honeylocust.

Canker
Root rot
Wood rot

Cottony Maple Scale
Pod Midge Gall
Plant Bug
Cankerworm
Mites
Aphids
Mimosa Webworm

GINKO

Selection Info Some Common Diseases Some Common Insects and Insect-related

Considered "Pest free," medium grower once established, smelly fruit - seed used as memory enhancer, male/female trees, fall color golden, last two weeks and sheds all leaves in less than 48 hours. Pyramidal forms. 50 to 80 feet tall.

 

Potato Leaf Hopper

LARCH

Selection Info Some Common Diseases Some Common Insects and Insect-related

Moist, well-drained acidic sois.
Sun, American & European species, European better tree, weeping & non weeping forms, 70 to 75 feet tall.

Root rot
Canker
Chlorosis
Wood rot

Cottony Maple Scale

LINDEN

Selection Info Some Common Diseases Some Common Insects and Insect-related

American 60 - 80 feet tall & little leaf 30 - 70 feet tall.
Little leaf better (60+ feet variety), likes moist well drained rich soils, tollerates, pollution, 30 to 70 feet tall.

Anthracnose
Scorch
Canker
Verticillium wilt
Wood rot
Root rot

Aphids
Plant bug

MAPLE

Selection Info Some Common Diseases Some Common Insects and Insect-related

Norway - Tolerates dry soil,
40 - 90 feet tall.
Crimson King (Dark purple foliage) schwedler (purplish green foliage)

Columnar varieties
Japanese - wide range uses, 15 - 25 feet tall.
Red - moist or dry acidic soils 40 - 60 feet tall.
Green (Gold fall color) & red foliage, cultivars, many cultivars include columnar silver - Fast grower, weak wood tolerates wide range of growing conditions, 50 - 120 feet tall.
Sugar - tolerates light shade, forest tree, moist well-drained soils, 60 - 120 feet tall.
Boxelder - weak wooded, short lived weedy tree, gets boxelder bug.

Anthracnose
Sooty mold
Verticillium wilt
Scorch
Chlorosis
Canker
Wetwood
Chemical injury
Wood rot
Root rot

Scale - Cottony - Leucanium - Oystershell
Aphids
Leaf Miner
Leaf Hopper
Flat headed apple borer
Leaf galls
Aerified mites

PINE

Selection Info Some Common Diseases Some Common Insects and Insect-related

Eastern White - moist well - drained slightly acidic soil, 50 - 150 feet tall.
Environmental conditions
Reason most die in ill.
Scotch - over planted, 30 - 90 feet tall.
Austrian - over planted, 50 - 100 feet tall.
Red - tolerates abused soils, 50- 125 feet tall.
Mugo - shrub up to 35 feet by 35 feet.

Sooty mold
Pine Wilt (especially Scotch)
Wood rot
Root rot
Canker
Rust
Needle diseases
Blight
Cast
Sphaeropsis (diplodia)
Tip blight (bird)
Yellowbelly
Sapsucker

Zimmerman Pine Moth
Mites
Pine Sawfly
Leucanium Scale
Pine Needle Scale
Pine Bark Adelgid
Sawyer Beetles
Shoot Moths
Pine Tip Moth
Aphids

SYCAMORE

Selection Info Some Common Diseases Some Common Insects and Insect-related

Albert - a mutation is not always stable, other species grown for colorful bark.
Messy tree due to anthracnose. 75 - 125 feet tall.

Sphaeropsis (Diplodia) Tip Blight
Anthracnose
Canker
Scorch
Powdery mildew
Wood rot
Root rot

 

TULIP TREE

Selection Info Some Common Diseases Some Common Insects and Insect-related

Tolerates wide range of growing conditions.
Green orange flowers blend in.
70 - 150 feet tall.

Sun scald
Scorch
Wetwood

Tulip Tree Scale
Magnolia Scale

OAK

Selection Info Some Common Diseases Some Common Insects and Insect-related

Burr - difficult to transplant, tolerates wide range of growing conditions, 70 - 100 feet tall.
Pin - fastest frowing & easiest to transplant 60 - 100 feet tall.
Reds (pointed leaves) very prone decay and wilt
White (rounded lobes) resistant to decay and wilt

Oak wilt
Wet wood
Anthracnose
Canker (bacterial and fungal)
Root rot
Wood rot
Leaf spot
Chlorosis
Scorch
Powdery Mildew
Leaf Blister

Leaf Miner
Succulent Oak Gall
Scale - Oyster - Leucanium
Aphids
Wood Borers (feeds on to rotting wood)
Gypsy Moth
Tussock Moth

WALNUT

Selection Info Some Common Diseases Some Common Insects and Insect-related

Nut is edible - Everything else toxic, can stain things black.
Tap root therefore hard to transplant, leafs out late & defoliates early.

Canker
Wood rot
Root rot
Leaf spots
Anthracnose
Downy spot
Powdery mildew

Fall Webworm
Aphids
Leucanium Scale

WILLOW

Selection Info Some Common Diseases Some Common Insects and Insect-related

Not for most home landscapes.
Weeping and non - weeping corkscrew is small short lived tree, these trees need constant source of moisture.
Can be messy.

Canker
Wood rot
Root rot
Crown Gall
Wetwood
Leaf spot
Powdery mildew
Sooty mold

Black Willow Aphid
Scale
Leucanium Scale